Performing an unplugged show at Nashville’s City Winery last night, Miranda Lambert scaled back her usual production and ramped up the guest list, with nearly a dozen artists joining her throughout the night.

Maren Morris, Ashley Monroe, Lady Antebellum’s Charles Kelley and hit songwriter Shane McAnally were among the musicians who spent time onstage, with everyone swapping songs and strumming acoustic guitars. Lambert also shone a light on a member of her own team, bandmate Scotty Wray, who’s been playing guitar and co-writing songs with the Platinumsinger since her 2005 debut, Kerosene.

“This song is. . .Oh god, I hope I don’t cry when I sing it,” she said at one point, while introducing one of Wray’s original numbers. “[Scotty] wrote this song 16 years ago, the year before I met him, and I have been in love with it for that long.”

While the song’s own author played guitar, Lambert then sang “Scars,” a country ballad about the damage life throws a lover’s way. It was one of the evening’s most emotional moments, delivered by a singer who’s picked up a few battle wounds of her own over the past year.

“I was never damaged enough to sing a song called ‘Scars,'” Lambert added, explaining why she’d never performed the song before. “It’s something you have to sell and really feel — and go through shit, basically — to execute.”